Hi all,
I have a contact at the Range Tool company that said they may be interested in doing a group buy for lower receivers and bolt carrier groups. They are a relatively small shop buy do produce quality parts. I've bought 3 uppers and a lower from them, all of which were on par with or better than all the major name brands. If not interested in the RT brand, they do carry Spikes, umbrella, and aero precision. Post if you're interested! Lowers go for as little as $65 so we may be able to get these for cheap!